Hateruma Threshold Days by Year (JA000047918)

10 fixed thresholds counted per year at Hateruma (JA000047918): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hateruma Thresholds

Hateruma: days with a maximum temperature at or above 30 C (86 F) in 39 years, most in 1954 with 139.
Hateruma: days with a maximum temperature at or above 90 F (32.2 C) in 39 years, most in 1988 with 64.
Hateruma: nights with a minimum temperature at or above 20 C (68 F) in 39 years, most in 1987 with 255.
Hateruma: nights with a minimum temperature at or above 25 C (77 F) in 39 years, most in 1983 with 145.
10 fixed thresholds have at least one qualifying day at Hateruma.

Days at or above 30 C (86 F)

39 years with a qualifying day

Days per year at Hateruma with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 139 in 1954.

Days at or above 30 C (86 F) per year at Hateruma
Year	Days	Decade average
1951	98	117.6
1952	132	117.6
1953	125	117.6
1954	139	117.6
1955	110	117.6
1956	127	117.6
1957	108	117.6
1958	111	117.6
1959	108	117.6
1960	104	109
1961	120	109
1962	128	109
1963	119	109
1964	118	109
1965	101	109
1966	90	109
1967	101	109
1968	94	109
1969	115	109
1970	120	107.1
1971	116	107.1
1972	81	107.1
1973	110	107.1
1974	105	107.1
1975	119	107.1
1976	99	107.1
1977	120	107.1
1978	111	107.1
1979	90	107.1
1980	126	108.1
1981	89	108.1
1982	97	108.1
1983	129	108.1
1984	104	108.1
1985	94	108.1
1986	97	108.1
1987	112	108.1
1988	125	108.1
1989	108	108.1

For each year, a bar from the first to the last day at Hateruma meeting 30 C (86 F).

First to last qualifying date each year at Hateruma
Year	First date	Last date
1951	1951-05-27	1951-10-21
1952	1952-05-04	1952-11-15
1953	1953-05-12	1953-11-09
1954	1954-05-06	1954-11-10
1955	1955-05-03	1955-10-14
1956	1956-04-26	1956-10-10
1957	1957-04-25	1957-10-16
1958	1958-04-24	1958-10-15
1959	1959-04-09	1959-09-23
1960	1960-05-05	1960-10-16
1961	1961-05-10	1961-10-05
1962	1962-05-08	1962-10-14
1963	1963-05-08	1963-10-01
1964	1964-04-22	1964-10-17
1965	1965-05-15	1965-10-06
1966	1966-04-23	1966-10-11
1967	1967-05-04	1967-09-21
1968	1968-05-11	1968-10-09
1969	1969-04-29	1969-09-28
1970	1970-05-06	1970-10-25
1971	1971-05-27	1971-10-23
1972	1972-05-30	1972-10-26
1973	1973-05-02	1973-10-12
1974	1974-05-20	1974-10-21
1975	1975-05-16	1975-10-28
1976	1976-05-19	1976-10-09
1977	1977-05-04	1977-10-17
1978	1978-05-18	1978-10-26
1979	1979-05-13	1979-09-25
1980	1980-05-13	1980-10-17
1981	1981-06-16	1981-10-13
1982	1982-05-20	1982-10-17
1983	1983-04-29	1983-10-22
1984	1984-06-09	1984-10-08
1985	1985-05-13	1985-10-16
1986	1986-06-04	1986-09-24
1987	1987-05-13	1987-11-01
1988	1988-05-06	1988-10-24
1989	1989-05-21	1989-10-11

Every Fixed Threshold

Fixed thresholds at Hateruma
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	39	139	1954	108
35 C (95 F): Days	4	6	1956	2
90 F (32.2 C): Days	39	64	1988	35
20 C (68 F): Tropical nights (min	39	255	1987	240
25 C (77 F): Days with min	39	145	1983	116
10 mm (0.39 in): Days with 10 mm or more rain	39	72	1985	56
25 mm (0.98 in): Days with 25 mm or more rain	39	41	1970	21
50 mm (1.97 in): Days with 50 mm or more rain	39	18	1970	6
100 mm (3.94 in): Days with 100 mm or more rain	37	7	1966	3
200 mm (7.87 in): Days with 200 mm or more rain	12	3	1966	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1951.

Download the Data

Data for Hateruma threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Hateruma Threshold Days by Year (JA000047918)

Key Facts for Hateruma Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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